gfs2: fsid=syz:syz.0: first mount done, others may mount
==================================================================
BUG: KASAN: stack-out-of-bounds in should_fault_in_pages fs/gfs2/file.c:784 [inline]
BUG: KASAN: stack-out-of-bounds in gfs2_file_buffered_write+0x4c8/0x874 fs/gfs2/file.c:1069
Read of size 8 at addr ffff80001ca86fb0 by task syz-executor161/3964

CPU: 1 PID: 3964 Comm: syz-executor161 Not tainted 5.15.154-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 __asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309
 should_fault_in_pages fs/gfs2/file.c:784 [inline]
 gfs2_file_buffered_write+0x4c8/0x874 fs/gfs2/file.c:1069
 gfs2_file_write_iter+0x3b8/0xc80 fs/gfs2/file.c:1165
 __kernel_write+0x488/0x8b0 fs/read_write.c:539
 __dump_emit+0x200/0x338 fs/coredump.c:875
 dump_emit+0x288/0x36c fs/coredump.c:912
 elf_core_dump+0x2598/0x3640 fs/binfmt_elf.c:2237
 do_coredump+0x12c8/0x2890 fs/coredump.c:826
 get_signal+0x3dc/0x1550 kernel/signal.c:2875
 do_signal arch/arm64/kernel/signal.c:890 [inline]
 do_notify_resume+0x320/0x32b8 arch/arm64/kernel/signal.c:943
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_da+0x118/0x20c arch/arm64/kernel/entry-common.c:495
 el0t_64_sync_handler+0xc0/0xe4 arch/arm64/kernel/entry-common.c:629
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584


addr ffff80001ca86fb0 is located in stack of task syz-executor161/3964 at offset 48 in frame:
 new_sync_read fs/read_write.c:405 [inline]
 __kernel_write+0x0/0x8b0 fs/read_write.c:485

this frame has 3 objects:
 [32, 48) 'iov'
 [64, 112) 'kiocb'
 [144, 184) 'iter'

Memory state around the buggy address:
 ffff80001ca86e80: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
 ffff80001ca86f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff80001ca86f80: f1 f1 f1 f1 00 00 f2 f2 00 00 00 00 00 00 f2 f2
                                     ^
 ffff80001ca87000: f2 f2 00 00 00 00 00 f3 f3 f3 f3 f3 00 00 00 00
 ffff80001ca87080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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